1、INTERNATIONAL TELECOMMUNICATION UNION ITU-T TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU SERIES O: SPECIFICATIONS OF MEASURING EQUIPMENT Genera I o. I (0212000) Scope and application of measurement equipment specifications covered in the O-series Recommendations ITU-T Recommendation O. I (Formerl
2、y CCITT Recommendation) ITU-T O-SERIES RECOMMENDATIONS SPECIFICATIONS OF MEASURING EQUIPMENT II .lll I - _“ 0.1-0.9 -. Il Genera Maintenance access 0.10-0.19 Automatic and semi-automatic measuring systems Equipment for the measurement of analogue parameters Equipment for the measurement of digital a
3、nd analogue/digital parameters 0.20-0.39 0.40-0.129 0.130-0.199 II For further details, please refer to the list of ITU-T Recomrnendatons. ITU-T Recommendation 0.1 Scope and application of measurement equipment specifications covered in the O-series Recommendations Summary This ITU-T Recommendation
4、gives a summary of the content of all O-series Recommendations. It lists the titles and contains information on scope and application of the Recommendations. In addition, an alphabetical list of measurement terms covered by O-series Recommendations helps the reader to select the right Recommendation
5、 for hisher application. Appendix I contains information about a crosstalk test device for carrier transmission systems. Source ITU-T Recommendation 0.1 was revised by ITU-T Study Group 4 (1997-2000) and approved under the WTSC Resolution 1 procedure on 4 February 2000. FOREWORD The International Te
6、lecommunication Union (ITU) is the United Nations specialized agency in the field of telecommunications. The ITU Telecommunication Standardization Sector (ITU-T) is a permanent organ of ITU. ITU-T is responsible for studying technical, operating and tariff questions and issuing Recommendations on th
7、em with a view to standardizing telecommunications on a worldwide basis. The World Telecommunication Standardization Conference (WTSC), which meets every four years, establishes the topics for study by the ITU-T study groups which, in turn, produce Recommendations on these topics. The approval of IT
8、U-T Recommendations is covered by the procedure laid down in WTSC Resolution 1. In some areas of information technology which fall within ITU-Ts purview, the necessary standards are prepared on a collaborative basis with IS0 and IEC. NOTE In this Recommendation, the expression “Administration“ is us
9、ed for conciseness to indicate both a telecommunication administration and a recognized operating agency. INTELLECTUAL PROPERTY RIGHTS ITU draws attention to the possibility that the practice or implementation of this Recommendation may involve the use of a claimed Intellectual Property Right. ITU t
10、akes no position concerning the evidence, validity or applicability of claimed Intellectual Property Rights, whether asserted by ITU members or others outside of the Recommendation development process. As of the date of approval of this Recommendation, ITU had not received notice of intellectual pro
11、perty, protected by patents, which may be required to implement this Recommendation. However, implementors are cautioned that this may not represent the latest information and are therefore strongly urged to consult the TSB patent database. o ITU 2001 All rights reserved. No part of this publication
12、 may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from ITU. CQNTENTS 1 2 3 4 5 5.1 5.2 5.3 5.4 Scope References Abbreviations . How to use this Recommendation Content of the O-series Recommendatio
13、ns General Recommendations . 5.1.1 Recommendation 0.3 - Climatic conditions and relevant tests for measuring equipment 5.1.2 Recommendation 0.6 - 1020 Hz reference test frequency . 5.1.3 Recommendation 0.9 - Measuring arrangements to assess the degree of unbalance about Earth . Maintenance access 5.
14、2.1 Recommendation O . 1 1 - Maintenance access lines . Automatic and semi-automatic measuring systems . 5.3.1 5.3.2 5.3.3 Recommendation 0.22 - CCITT Automatic Transmission Measuring and signalling testing Equipment ATME No . 2 Recommendation 0.27 - In-Station Echo canceller Test equipment . Recomm
15、endation 0.33 - Automatic equipment for rapidly measuring stereophonic pairs and monophonic sound-programme circuits, links and connections . Equipment for the measurement of analogue parameters 5.4.1 5.4.2 5.4.3 5.4.4 5.4.5 5.4.6 5.4.7 5.4.8 5.4.9 5.4.10 Recommendation 0.41 . Psophometer for use on
16、 telephone-type circuits Recommendation 0.42 . Equipment to measure non-linear distortion using the 4-tone intermodulation method Recommendation 0.6 1 - Simple equipment to measure interruptions Recommendation 0.62 - Sophisticated equipment to measure Recommendation 0.7 1 - Impulsive noise measuring
17、 equipment for telephone-type circuits Recommendation 0.72 - Characteristics of an impulsive noise measuring instrument for wideband data transmissions . Recommendation 0.8 i - Group-delay measuring equipment for telephone-type circuits Recommendation 0.82 - Group-delay measuring equipment for the r
18、ange 5 to 600 kHz Recommendation 0.91 - Phase jitter measuring equipment for telephone-type circuits Recommendation 0.95 - Phase and amplitude hit counters for telephone-type circuits on telephone-type circuits . interruptions on telephone-type circuits Page i 1 2 3 3 4 4 4 4 4 4 5 5 5 5 5 5 6 6 6 6
19、 6 6 7 7 8 5.4.1 1 Recommendation 0.1 11 - Frequency shift measuring equipment for use on camer channels Equipment for the measurement of analogue/digital and digital parameters . 5.5 5.5.1 5.5.2 5.5.3 5.5.4 5.5.5 5.5.6 5.5.7 5.5.8 5.5.9 5.5.10 5.5.1 1 5.5.12 5.5.13 5.5.14 Recommendation O . 13 1 .
20、Quantizing distortion measuring equipment using a pseudo-random noise test signal . Recommendation O . 132 . Quantizing distortion measuring Recommendation O . 133 . Equipment for measuring the performance of PCM encoders and decoders . Recommendation O . 150 . General requirements for instrumentati
21、on for performance measurements on digital transmission equipment Recommendation O . 15 1 - Error performance measuring equipment for digital systems at the primary bit rate and above Recommendation O . 152 - Error performance measuring equipment for bit rates of 64 kbit/s and N x 64 kbit/s Recommen
22、dation O . 153 - Basic parameters for the measurement of error performance at bit rates below the primary rate . Recommendation O . 161 . In-service code violation monitors for Recommendation O . 162 . Equipment to perform in-service monitoring on 2048, 8448, 34 368 and 139 264 kbits signals Recomme
23、ndation O . 163 . Equipment to perform in-service monitoring on 1544 kbit/s signals Recommendation 0.1 71 . Timing jitter and wander measuring equipment for digital systems which are based on the Plesiochronous Recommendation O . 172 . Jitter and wander measuring equipment for digital systems which
24、are based on the Synchronous Digital Hierarchy (SDH) Recommendation O . 18 1 . Equipment to assess error performance on STM-N interfaces Recommendation O . 191 . Equipment to measure the cell transfer equipment using a sinusoidal test signal . digital systems . Digital Hierarchy (PDH) . performance
25、of ATM connections Annex A . Alphabetical list of measurement terms covered by O-Series Recommendations Appendix I . Crosstalk test device for carrier transmission on coaxial systems I . 1 Introduction 1.2 Operation 1.3 Basic technical parameters of a device designed for transmission systems at freq
26、uencies less than 18 MHz . 1.3.1 Basic characteristics 1.3.2 Several technical charactenstics Page 8 8 8 9 9 10 10 10 10 10 10 11 11 11 12 12 13 21 21 21 23 23 23 Introduction This Recommendation is intended to help maintenance personnel and other interested parties to select the test equipment spec
27、ified by an O-series Recommendation which is applicable to a specific measurement task. For this reason, this Recommendation lists the titles of all O-series Recommendations and informs about their scope and application. An alphabetical list of measurement terms covered by the O-series Recommendatio
28、ns is given in Annex A. This Recommendation does not contain any test equipment specification. Background Within the ITU Standardization Sector, Study Group 4 is responsible for Network Maintenance. One of its tasks is defining measuring equipment required to assess network quality. Different kinds
29、of measuring equipment Recommendations have to be considered, namely those covering: a) conformance tests for telecommunications equipment; and operational matters, e.g. procedures for bringing circuits into service and routine performance checks. The kinds of tests for checking compliance with thes
30、e two categories of Recommendations are essentially different, and this often leads to a different choice of test equipment. Category a) tests will normally be more comprehensive. Their purpose (often based upon measurements of sample or prototype equipment) is to certify compliance with design obje
31、ctives and they may therefore be a prerequisite to equipment being accepted for installation in a network. Such tests are unlikely to be employed routinely. Category b) tests, however, are used systematically and repetitively and their widespread application may necessitate additional considerations
32、, in particular the need for: 1) conformity of results when tests may be performed using test equipment supplied by several manufacturers; and 2) a common measurement technique to ensure compatibility when a test requires measurement equipment at both ends of a device under test. It is primarily for
33、 these circumstances that ITU-T issues the O-series Recommendations. The above remarks apply equally to analogue and digital techniques. b) ITU-T Recommendation 0.1 Scope and application of measurement equipment specifications covered in the O-series Recommendations 1 Scope This ITU-T Recommendation
34、 is intended to help maintenance personnel and other interested parties to select the test equipment specified by an O-series Recommendation which is applicable to a specific measurement task. For this reason, this Recommendation lists the titles of all O-series Recommendations and informs about the
35、ir scope and application. An alphabetical list of measurement terms covered by the O-series Recommendations is given in Annex A. This Recommendation does not contain any test equipment specification. 2 References The following ITU-T Recommendations and other references contain provisions which, thro
36、ugh reference in this text, constitute provisions of this Recommendation. At the time of publication, the editions indicated were valid. All Recommendations and other references are subject to revision: all users of this Recommendation are therefore encouraged to investigate the possibility of apply
37、ing the most recent edition of the Recommendations and other references listed below. A list of the currently valid ITU-T Recommendations is regularly published. 111 121 31 41 c51 c71 cg1 c91 ITU-T Recommendation G.117 (I 996), Transmission aspects of unbalance about Earth. ITU-T Recommendation G. 1
38、65 (1 993), Echo cancellers. ITU-T Recommendation G.7 12 (1 996), Transmission performance characteristics of pulse code modulation. ITU-T Recommendations Q.550-senesY Transmission characteristics. ITU-T Recommendation G.821 (1 996), Error performance of an international digital connection operating
39、 at a bit rate below the primary rate and forming part of an integrated services digital network. ITU-T Recommendation G.826 (1 999), Error performance parameters and objectives for international, constant bit rate digital paths at or above the primary rate. ITU-T Recommendation M.2 1 O0 (1 993, Per
40、formance limits for bringing-into-service and maintenance of international PDHpaths, sections and transmission systems. ITU-T Recommendation G.707 (1 996), Network node interface for the synchronous digital hierarchy (SDH). ITU-T Recommendation G.783 (1 997), Characteristics of synchronous digital h
41、ierarchy (SDH) equipment functional blocks. ITU-T Recommendation G.784 (1 999), Synchronous digital hierarchy (SDH) management. ITU-T Recommendation M.2 1 O 1 (2000), Perj6ormance limits and objectives for bringing- into-service and maintenance of international SDHpaths and multlple sections. ITU-T
42、Recommendation 1.356 (2000), B-ISDN ATM layer cell transfer performance. ITU-T Recommendation 1.357 (I 996), B-ISDN semi-permanent connection availability. 141 151 16 17 181 191 20 21 22 ITU-T Recommendation 1.361 (1 999), B-ISDN ATM layer specification. ITU-T Recommendation 1.610 (1 999), B-ISDN op
43、eration and maintenance principles and functions. ITU-T Recommendation G.823 (2000), The control of jitter and wander within digital networks which are based on the 2048 kbit/s hierarchy. ITU-T Recommendation G.824 (2000), The control of jitter and wander within digital networks which are based on t
44、he 1544 kbit/s hierarchy. ITU-T Recommendation G.825 (2000), The control of jitter and wander within digital networks which are based on the synchronous digital hierarchy (SDH). CCITT Rec,ommendation G.793 (1 988), Characteristics of 60-channez transmultiplexing equipments. CCITT Recommendation G.79
45、4 (1 988), Characteristics of 24-channel transmultiplexing equipments. ITU-T Recommendation G.704 (1998), Synchronous frame structures used at 1544, 6312, 2048, 8448 and 44 736 kbit/s hierarchical levels. CCITT Recommendation G.75 1 (1 988), Digital muZtlex equipments operating at the third order bi
46、t rate of 34 368 kbit/s and the fourth order bit rate of 139 264 kbit/s and using positive justification. 3 Abbreviations This Recommendation uses the following abbreviations: A-A Analogue to Analogue A-D Analogue to Digital AIS Alarm Indication Signal AMI Alternate Mark Inversion ATM Asynchronous T
47、ransfer Mode ATME AU-AIS AU-LOP CDV Cell Delay Variation CER Cell Error Ratio CLR Cell Loss Ratio CMR Cell Misinsertion Rate CMR Common Mode Rejection CRC Cyclic Redundancy Check CTD Cell Transfer Delay D-A Digital to Analogue D-D Digital to Digital HDB 3 HP-RDI Automatic Transmission Measuring and
48、signalling testing Equipment Administrative Unit Alarm Indication Signal Administrative Unit Loss Of Pointer High Density Bipolar with 4-zero suppression Higher-order Path Remote Defect Indication HP-REI HP-TIM ILIL ISET LCL LCTL LOF LOS LP-RDI LP-REI LP-TIM MS-AIS MS-RDI OOF OSB PDH SDH TCL TCTL TU
49、-AIS TU-LOM TU-LOP Higher-order Path Remote Error Indication Higher-order Path Trace Identifier Mismatch Input Longitudinal Interference Loss In-Station Echo canceller Test equipment Longitudinal Conversion Loss Longitudinal Conversion Transfer Loss Loss Of Frame alignment Loss Of Signal Lower-order Path Remote Defect Indication Lower-order Path Remote Error Indication Lower-order Path Trace Identifier Mismatch Multiplex Section Alarm Indication Signal Multiplex Section Remote Defect Indication Out Of Frame alignment Output Signal Balance Plesiochronous Digital Hierarc
